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    <title>Document</title>
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    <script>
        // 数组转换为字符串
        // 1. toString()
        var arr = [1,2,3]
        console.log(arr.toString()); //1,2,3 黑色字体为字符串
        // 2. join(分隔符) 默认为' , '
        var arr1 = [1,2,3]
        console.log(arr1.join('-')); // 1-2-3


    </script>
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